fix geometry tutorial regarding the need to specify the "mode"
fix geometry tutorial regarding the need to specify the "mode"

ROCmSoftwarePlatform/hipeigen,toastedcrumpets/eigen,ROCmSoftwarePlatform/hipeigen,pasuka/eigen,ROCmSoftwarePlatform/hipeigen,TSC21/Eigen,ritsu1228/eigen,Zefz/eigen,ritsu1228/eigen,pasuka/eigen,TSC21/Eigen,toastedcrumpets/eigen,toastedcrumpets/eigen,ritsu1228/eigen,pasuka/eigen,TSC21/Eigen,Zefz/eigen,toastedcrumpets/eigen,pasuka/eigen,ROCmSoftwarePlatform/hipeigen,TSC21/Eigen,Zefz/eigen,Zefz/eigen,pasuka/eigen,ritsu1228/eigen,ritsu1228/eigen